Apparatus for shaping sheet metal



J1me 3 o. .1. GROEHN ET AL APPARATUS FOR SHAPING SHEET METAL 28, 1927 3 Sheets-Sheet 1 Original Filed Dgc.

(ginverafarsr /3 ime June 16, 1931. o. J. GROEHN ET AL 1,809,844

APPARATUS FOR SHAPING SHEET METAL Original Filed Dec. 28, 192 3 Sheets-Sheet 2 mun L Z'n ven tors- June 16, 1931. o. J. GROEHN ET AL APPARATUS FOR SHAPING SHEET METAL Original Filed Dec. 28, 1927 w ens-sheet s w 1 5 i. z

a a g IE 5 i a: J

Patented J ne 165' 193i o'n'ro; a o-Rom, oFenossn roiiwnfrnnxnivn 1 LAWRENCE SL-FLAMB, :on Gnossn 301N111, MIoHIGAN,-IAssIGNoRs ToaHUDsoN Mo'troR'cAR COMPANY, on DETROIT, MIcHIGAN, A: coRronA'rIoN or MICHIGAN: a a

V ArrnnA'rus non srmrrive snnn'r" METAL Original application utant 2s, 1927,1Sriali 110. most. Patent No. 1,708,615 dated April 9, 1929.-

' Divided and this application filed February 8, 1929. Serial 'No. 338,467.

This invention relates to apparatus for shaping-sheet metal and'more particularlyto" apparatus for turning inward the body ofa sheet metal strip 'havin a flange ofiset by folding a portion of. the ange over the body.

The application is adivision of our copending application Serial No. 243,030 filed December '28, 1927, Patent No. 1,708,615,

. dated April 9, 1929, which'discloses a method of shaping sheet metal to produce a quarter window finish molding for an automobile Fig. 1 is a plan viewof the lower; half of K anapparatus embodying the invention;

Fig. 2 is aiside elevational View of the same; and V Figs. 3, 4, 5 and 6 are sectionalviews taken upon line 3-3, Fig. 2. Before explaining in detail the present invention, it is to be understood thatthe invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the invention is capable of other embodiments and of being practiced or carried out in various ways. Also it isto be understood that the phraseology orterminology employed herein is forthe purpose of description and not of limitation, and it' is not intended to limit the invention beyond the terms'of the several claims "hereto ap pendedas considered in view ofthe prior art and the requirements thereof. I p

p The apparatus of the invention is adapted particularly for shaping a sheet-metal blank previously formed with offset flanges 7a and 7 band having a projecting body portion 76. 7

One embodiment of the invention is illustrated by the apparatus shown-in the'drawings which comprisesa base 1 5 having a 1 6 secured in any suitable man'ner, by screws-17', to the topsurfac'e of thebase near one side, thereoffor supporting the 'body'of theblank with a-flange overhanging and engaging the side of the'block. A plu rality of projections 18 extend upwardly 1 7 lower die member 22 is mounted for movement alongthe top surface of the base'be; tween'the projections18 and the block 16. A hardened" die block 23'having a cam suratfljone side offthe base and havevwear ng blocks 19 securedto theirinner upperedges in any suitable manner, as by bolts 2O. A

face-27 is secured uponthe inner upper edge of the die22, as by screws 24, and a hardened wearing block 25 is secured to the upper outer-edge of the die, asby screws 26;

' The die'22 normally is held away from the block'lfiin any suitable'manner. As illustrated; ,a bracket 28 is secured tothe base, as

bolts .29, and is provided near its upper the: free passage of 'abolt 31isecured to the die 22;; A 'spring33 surrounds the b01331 and extends ,betweenthe outer surface of the P bracket 28 and a washer 34 positioned and the lower surface ofth ram 36, as by screws r 413 andis positioned to engage and shape a portion of the body I of the blank around the lowerdie block23; I i recess l l is provided i'n the lower surface of f the' ram: to receive for movement thereend withian opening adapted to permit in a work'g'rip'p'ing member which issez; curedto theramlby bolts 46 secured tothe is held gin? extended position ,by' springs 50 positioned in recesses 51 'in the ram andfengagingthe 'top sur'face ofthememb'er 4&5. A

- memoer4l 5'and pas'singthrough openings 45:" injthe ramfl provided' iwith shoulders 18 j adaptedto'engage the head of the bolt and I serve as stop. The member 45 normally.

36 as by bolts 56 and depends therefrom so as to enter the space between the blocks 19 and upon the projections 18 and lower die 22 respectively.

To turn the projecting portion 7e of the body of the blank inward the blank is sup ported in inverted position upon the block 16 with the flanges 7 b overhanging and engaging the side of the block. The ram 36 is then lowered to bring the work gripping member 45 into engagement with the body of the blank and hold the same yieldingly against the member 16. At the same time the cam 55 engages the cam surface 27 upon the lower die and moves the latter into engagement with the flanges 7 b of the blank and holds the same against the side of the block 16 thereby positioning the lower die block 23 beneath the portion 7a of the body of theblank. Upon further downward movement of the ram, the upper die block 40 is brought into engagement with the portion 76 of the body of the blank and shapes the same against the lower die block 23 to turn the portion 776 inwardly.

What we claim is:

1. In an apparatus for shaping sheet met-a1 previously folded with an offset flange, the combination of a member for sup orting the body of the metal sheet with the ange overhanging and normally resting thereagainst, a lower die movable under a portion of the body of the metal sheet to bring one side thereof against said flange and hold it against said member, and an upper die movable to shape said portion over said lower die and against another side thereof.

2. In an apparatus for shaping sheet metal previously folded with an offset flange, the combination of a member for supporting the body of the metal with the flange overhanging and normally resting thereagainst, a lower die movable under a portion of the body of the metal to hold said flange against said member, an upper die movable to shape said portion against said lower die, and means for holding the main portion of the body against said member,

3. In an apparatus for shaping sheet metal previously folded with an offset flange, the

combination of a member for supporting the body of the metal with the flange overhang ing and normally resting thereagainst, a lower die movable under a portion of the body of the metal to hold said flange against said member, an upper die movable to shape said portion against said lower die, means for holding the main portion of the body against said member, and means normally holding the lower die away from said member. I

4. In an apparatus for shaping sheet metal previously folded with an offset flange, the combination of a member for supporting the body of the metal with the flange overhanging and resting thereagainst, a lower die movable under a portion of the body of the metal to hold said flange against said member, means normally holding the lower die away from said member, a ram movable toward and from the lower die, a cam on said ram for moving the lower die to hold the flange against said member, an upper die mountedon said ram to engage and shape said portion of the body to the metal against the lower die, and a gripping member yieldingly mounted in said ram and adapted to hold the main portion of the body against said supporting member.

In testimony whereof we aflix our signatures.

OTTO J. GROEHN. LAWRENCE S. LAMB. 

